Made get/set methods for jobQ, changeTime and totalWait in Machine.java.
Removed set method for jobQ and totalWait.  Made putInJobQ() method in
MachineShopSimulator.java for machine[p].getJobQ.put(theJob).
Made get/set methods for numTasks and activeJob in Machine.java.
Removed set methods for numTasks and activeJob in Machine.java.